Three-Phase Photovoltaic System With Three-Level Boosting MPPT Control

Abstract

Abstract-This paper proposes a three-phase photovoltaic (PV) system with three-level boosting maximum power point tracking (MPPT) control. A simple MPPT control using a power hysteresis tracks the maximum power point (MPP), giving direct duty control for the three-level boost converter. The three-level boost converter reduces the reverse recovery losses of the diodes. Also, a weighted-error proportional and integral (PI) controller is suggested to control the dc link voltage faster. All algorithms and controllers were implemented on a single-chip microprocessor. Experimental results obtained on a 10-kW prototype show high performance, such as an MPPT efficiency (MPPT effectiveness) of 99.6%, a near-unity power factor, and a power conversion efficiency of 96.2%.Index Terms-Maximum power point tracking (MPPT), photovoltaic (PV) system, three-level boost converter.

Hardware methods for detecting global maximum power point in a PV power plant

“…In contrast to interleaved boost converters, TLB converter also assures low current ripple in the inductor branch. Moreover, TLB converter with the split output capacitor is suitable for operation multilevel grid-tied converter as it allows for DC-link voltage balancing [37], [38]. Gating signals for the switches are 180 • out of phase, resulting in four possible states shown in Fig.…”

A comprehensive review of photovoltaic systems

“…out by a power calculation based on the open circuit voltage [86]. The P&O algorithm is used for different parameters such as voltage, current, and duty cycle with change of step size [87]. To determine the operating point, a variable gradient method is used with the power-voltage curve where the perturbation parameter is duty cycle with constant step size [88].…”

Hardware implementation of optimization technique based sensorless MPPT method for grid-connected PV generation system

“…As such, many MPPT methods have been developed and implemented [1]- [4]. These methods vary in complexity, required sensors, convergence speed, cost, range of effectiveness, implementation hardware, popularity, and in other respects.…”

“…Therefore, it is difficult to record and store all possible system conditions. In contrast, the IC (Incremental Conductance) method and P&O (Perturb-and-Observe) method have an advantage of not requiring solar panel characteristics [3,4]. Many sensorless MPPT methods have been also developed now a days.…”